protected boolean internalCancel()

in eureka-core/src/main/java/com/netflix/eureka/registry/AbstractInstanceRegistry.java [297:343]
44 lines of code
6 McCabe index (conditional complexity)

    protected boolean internalCancel(String appName, String id, boolean isReplication) {
        read.lock();
        try {
            CANCEL.increment(isReplication);
            Map<String, Lease<InstanceInfo>> gMap = registry.get(appName);
            Lease<InstanceInfo> leaseToCancel = null;
            if (gMap != null) {
                leaseToCancel = gMap.remove(id);
            }
            recentCanceledQueue.add(new Pair<Long, String>(System.currentTimeMillis(), appName + "(" + id + ")"));
            InstanceStatus instanceStatus = overriddenInstanceStatusMap.remove(id);
            if (instanceStatus != null) {
                logger.debug("Removed instance id {} from the overridden map which has value {}", id, instanceStatus.name());
            }
            if (leaseToCancel == null) {
                CANCEL_NOT_FOUND.increment(isReplication);
                logger.warn("DS: Registry: cancel failed because Lease is not registered for: {}/{}", appName, id);
                return false;
            } else {
                leaseToCancel.cancel();
                InstanceInfo instanceInfo = leaseToCancel.getHolder();
                String vip = null;
                String svip = null;
                if (instanceInfo != null) {
                    instanceInfo.setActionType(ActionType.DELETED);
                    recentlyChangedQueue.add(new RecentlyChangedItem(leaseToCancel));
                    instanceInfo.setLastUpdatedTimestamp();
                    vip = instanceInfo.getVIPAddress();
                    svip = instanceInfo.getSecureVipAddress();
                }
                invalidateCache(appName, vip, svip);
                logger.info("Cancelled instance {}/{} (replication={})", appName, id, isReplication);
            }
        } finally {
            read.unlock();
        }

        synchronized (lock) {
            if (this.expectedNumberOfClientsSendingRenews > 0) {
                // Since the client wants to cancel it, reduce the number of clients to send renews.
                this.expectedNumberOfClientsSendingRenews = this.expectedNumberOfClientsSendingRenews - 1;
                updateRenewsPerMinThreshold();
            }
        }

        return true;
    }